Don’t Mess With an Old Man and His Dog

From Wikipedia:

Cheng Peng (Chinese: 程鹏; 1962 – 25 September 1995) was a Chinese serial killer and dog breeder who killed six people in Yinchuan from 1988 to 1995, occasionally with the help of three accomplices. He is best remembered for fact that he fed some of his victims' remains to his dogs, one of which was featured in the 1993 film An Old Man And His Dog (Chinese: 老人与狗), directed by renowned Chinese director Xie Jin, in which Peng himself was also cast as a body double to lead actor Tian Xie.